668225 has 6 divisors (see below), whose sum is σ = 828630. Its totient is φ = 534560.

The previous prime is 668221. The next prime is 668243. The reversal of 668225 is 522866.

It can be written as a sum of positive squares in 3 ways, for example, as 66049 + 602176 = 257^2 + 776^2 .

It is not a de Polignac number, because 668225 - 2² = 668221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13340 + ... + 13389.

It is an arithmetic number, because the mean of its divisors is an integer number (138105).

2⁶⁶⁸²²⁵ is an apocalyptic number.

It is an amenable number.

668225 is a deficient number, since it is larger than the sum of its proper divisors (160405).

668225 is a wasteful number, since it uses less digits than its factorization.

668225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26739 (or 26734 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 668225 is about 817.4503042999. The cubic root of 668225 is about 87.4260599851.

The spelling of 668225 in words is "six hundred sixty-eight thousand, two hundred twenty-five".